Please enable JavaScript.
Coggle requires JavaScript to display documents.
Let's Recapitulate-Science-Class 7-Ch. 16-Natural Resources - Coggle…
Let's Recapitulate-Science-Class 7-Ch. 16-Natural Resources
1. Natural Resources
Substances obtained from
nature
.
Satisfy a variety of needs
.
Soil, Minerals, Air, Water, Plants and Animals
.
2. Natural resources in the Earth’s Crust
Earth’s Lithosphere
: made up of
land and
the hard crust
beneath it.
Lithosphere has
Minerals, Ores, Mineral Oil and other Fuels, Rocks, Water, Elements
, etc.
3. Minerals
Formation of Minerals
Formed from
Magma and Lava
Formed after
Evaporation
Formed due to
changes in Temperature and Pressure
Formed by
production of Inorganic Minerals by Organisms
Obtained from
Mining
.
Classification of Minerals
Metal Minerals
: Iron, Gold, Silver, etc.
Non-Metal Minerals
: Mica, Sulphur, Gypsum, etc.
Energy Minerals
: Coal, Mineral Oil, Natural Gas.
4. Ores
Minerals
that contain
a
high proportion of metal
Metals
are obtained by
Extraction and Purification of Ores
Important
Minerals and Ores
Iron Ore
Four main ores of iron are
Magnetite
,
Haematite
,
Limonite
and
Siderite
.
Farming Implements, Rails of Railway Tracks, Fences
, etc.
Manganese
Preparation of Medicines, Batteries, Electrical Appliances
, etc.
Bauxite
Ore of Aluminium
Aluminium:
Good conductor of Electricity and Heat and low Density
Aeroplanes, Transport vehicles and to make Electric
wires
Copper
Very good conductor of
Electricity
Electric wires, Kitchen Utensils, Statues, etc
.
Mica
Bad conductor of Electricity
Ayurvedic Medicines, Dyes, Electric Equipment,
etc.
